'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'study4j' // 页面title

// 如果你的端口设置为80，
// 使用管理员权限执行命令行。
// 例如，Mac: sudo npm运行
// 你可以通过以下方法来改变端口:
// port = 9528 npm运行dev或npm运行dev——端口= 9528
const port = process.env.port || process.env.npm_config_port || 8080// dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   *如果您计划在子路径下部署站点，则需要设置publicPath，
   *例如GitHub页面。如果您计划将您的站点部署到https://foo.github.io/bar/，
   *然后将publicPath设置为“/bar/”。
   *在大多数情况下请使用'/' !!
   *细节:https://cli.vuejs.org/config/ publicpath
   */
  publicPath: '/',
  outputDir: 'dist', // build输出目录
  assetsDir: 'static', // 静态资源目录（js, css, img）
  lintOnSave: process.env.NODE_ENV === 'development', // 是否开启eslint
  productionSourceMap: false,
  devServer: {
    port: port,
    open: false, // 是否自动弹出浏览器页面
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      '/proxyApi': {
        target: 'http://localhost:8088', // API服务器的地址
        ws: true, // 代理websockets
        changeOrigin: true, // 虚拟的站点需要更管origin
        pathRewrite: {
          '^/proxyApi': '/study4j-sm' // 通过pathRewrite重写地址，将前缀/proxyApi转为''
        }
      }
    }
    // after: require('./mock/mock-server.js')
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
    // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  }
}
